Jib crane boom margins mainly use (pitching) rotation around the vertical axis with lifting goods, the use of flexible action to meet the loading requirements, in the form of fixed, mobile and floating. Fixed jib crane mounted directly on the dock or pier base library field, can only work in situ. Some of the boom is not only pitching rotation, and some can tilt can be reversed.
2013年7月28日星期日
Gantry crane dismantling of the various components
Gantry crane will be traveling to the removal position, so that the location and legs tied to the anchor point alignment, with the embrace wind rope fixed on both ends of the legs and tighten the fixed-gourd.
sino hoist crane lifting the door to the main beam traveling ends, both ends of the wheel clogged with iron shoes to prevent slippery.
The spreader fell to the ground, remove the rope. Check the electrical cabinet of the outgoing cable nameplate are complete and accurate, and that identifies the complement. Remove the electric hoist lifting all the cables, and a good dish away. Continue to dismantle the door hanging all power and control cables.
50T electric hoist gantry crane demolition were removed using two electric hoist, electric hoist weight about 1T, requiring the magnitude of 10m, rod length 18.8m, rated lifting weight 12T. 3.5 girders removed.
Using two 50T crane lifting beams together with removal of main beam, crane support vehicles in the track between the auxiliary crane gantry crane support vehicles in the east. Center of rotation of the gantry crane to avoid embrace wind rope. At both ends of the main beam selection two ¢ 21.5 rope tied at the end of the main beam lift crane, truck crane master synchronization raised arm, so that the north west side of the main beam, turn south east, until the main beam wrong door After hanging legs, two cranes sync down the main beam to the ground. Before lifting the corner of the main girder good pad pad tile to prevent cutting steel rope. Before lifting girder ends leash rope swing in the air to prevent the main beam. Girder weight about 20T, requires both ends of the main girder crane slewing radius of 8m, rod length 24.6m, at this time the amount of load of crane 15.8T, crane hoists at this time to meet the construction requirements of construction.
overhead gantry crane outrigger removed using a main hoisting crane 50T, 50T crane with a job. Use wire rope as the lifting rope ¢ 21.5, at the corner pad good steel outrigger pads tile to prevent cutting rope. Each side of the leg weighs about 4T, 50T crane range 12m, arm length 24.6m, the amount set for the 9T, 50T crane auxiliary rope hanging two ¢ 21.5 bundled in the bottom of the legs, around the corner pad steel mat tile, two cranes safe removal.
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